full-disclosure - phpBB 2.0.17 remote avatar size bug

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <1f9bad3a05092003552d33939e@mail.gmail.com>
Date: Tue Sep 20 12:51:04 2005
From: smok3f00 at gmail.com (SmOk3)
Subject: phpBB 2.0.17 remote avatar size bug

Title: phpBB remote avatar size bug
Software: phpBB 2.0.17 (and maybe prior versions)
Discovered by: David Sopas Ferreira < david at systemsecure dot org >
Original link: http://www.systemsecure.org/ssforum/viewtopic.php?t=272

? Email from phpBB ?

Your report "Avatar size" has been closed because your reported issue is
invalid.
Classifying a report as invalid can have various reasons, most of the time
the report is incomplete.

If you think your report has been handled incorrecly, please submit
another report at http://www.phpbb.com/security/index.php.

Comment added by team member:

This isn't a security problem. You can do the same thing with a standard
webpage. As for checking remote avatar size, there are several inherit
problems with that, which I won't detail here. As this isn't a security
problem, closing.

? End Of Mail - ?

? My personnal opinion:

I think this is a minor security problem. A malicious user can use larger images
(for example: 1280px - 1024px) to almost damage the entire view of a
topic. This, to
be done, has to have Remote Avatar selected.

So, if the admins don't consider this a minor security problem, what
is it? A "special"
feature?

I don't want to criticize the phpBB coders, but why is it dificult to
check out the size
of a image and telling the user that that size of image it's not
possible, or even block the
size on the viewtopic table, something like that.

? Possible solution:

Disable remote avatar or just dig in the code to set the image size you want.